Plug ejector



L. P. GLLENTINE FLUG EJECTOR Filed May l5, 1944 'its cooperating terminal member.

Patented Nov. 4. 1947 Lucani-a r. emmene, United stam Amy,

Arlington, Va. l

Y Application Mayl l5, 1944, Serial No. 535,699

2 Claims. (Cl. 173-361) (Granted under the act ofMar-oh 3, 1883, as

The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.

This invention concerns certain electrical equipment, and speciilcally it is a means forv amended April 30, 1928; 370 0. G. 757) of normal construction, with my invention ap- "plied thereto; the invention being in normal,

inoperative position.

facilitating the removal of a multiple-terminal plug from a cooperating terminal member.

In some. electrical arts, particularly in communications, where a great many individual circuits must be made and broken frequently, it "is I customary, in order to save space, to enclose the wires, insofar as it maybe feasible, in cables. At the end of such a cable will be arranged a multiple-terminal contact member or plug, such asI is commonly known as a Jones plug. A cooperating female terminal' member, which may correspond in size to the plug but is usually in the form of a large board, is adapted to receive the Jones plug, and thus to make the various circuits. The terminals of the Jones A-plug and the cooperating receiving member are so shaped and arranged that only proper-circuits can be made, it being impossible to insert the plug improperly. Neither the plug itself, however, nor

the arrangement of the terminal members thereof, forms any part of the present invention.

The difliculty which this invention is intended to overcome arises out of the fact that each male terminal member must lit snugly within A Jones plug of ordinary size contains thirty terminals. Such a, plug can be inserted readily, but once in the AFigure 2 is a side elevationof the device of Figure 1, the parts of the invention Abeing shown in theirextended positions.

Referring to the drawings, ID is a Jones plug I of usual form, and is a cable containingthe 1wires of the various circuits handled by the plug. Terminal 'members are arranged on the plug. Terminals |2 are flattened posts, the flat sides of which areparallel to the length of the f plug; terminals I3 are similar in shape, but

their fiat sides are arranged crosswise to the length of the plug; and terminals I4, running midway of the width otthe plug, are shaped and arranged just'as are terminals I3. Terminal I5 is a rounded post, and is larger and longer -than |2, I3, and Il. As mentioned earlier, the

forms and arrangement of these terminal members do not constitute partsof this invention; they -merely assure that the plug will be inserted ,properly in the socket board.

I a bar I9 connecting the arms. Arm I8 is pivoted to the plug I0, at 20, just as armil is pivoted.

board or other socket element, the friction load is such that removal is diilicult, and sometimes 'results in loose, bent, or twisted terminals which require'carefulY repair before the plug is again fit for use.

One object of the present invention is, therefore, to produce a simple mechanical means for readily separating a Jones plug or the like from its cooperating socket member.

Another object is to provide `a means of thenature mentioned whereby, the separating force may always be applied in a line substantially parallel to the length of male terminal members.

A further object is to provide a mechanical means as above having a normal, inoperative position, and an extended position, and means for restoring the mechanical meansl to normal position after use. f

Additional objects will be apparent from .a

A second member, similar to that just described, includes arms 2| and 22, and connecting bar 23. Arms 2| 'and 22 also are pivoted to plug I0, at I6. and 2|), respectively, and in such a manner that they intersect the iirst two mentioned arms |l and I8. The arms I1, I8, 2|, and 22, have their free ends, |1, |8,' 2|,' and 22, respectively, somewhat rounded off. The reason for this will be explained. E A spring, 24, coiled around pivot screw I8 and connected Vto arm |'l and to arm 2|, servesl reading of the following specications and claims. V

to maintain the arms normally in the lcondition lshown in Fig. 1. Spring 25 affects arms I8 and 22 in asimilar manner. Of course, other types oi springs can be used.

The operation of the ejector will be vreadily apparent, and it will be only briefly described.

Assuming the plug to be in place, it may be easily removed by grasping the bars i9 and 23 between a thumb and forefinger, and pressing the same toward each other. Obviously the free ends i1 and 2| of the arms ||V and 2|, on the one side of the plug, and ends I8' and 22' of arms I l and 22, on the other, willl describe arcs that will carry them beyond \the top of the plug case, and to or about the extremities -of the terminalmemin Figure 2in order to loosen the plug in itsl socket. If it is, in fact, necessary, the lowermost portions of the connecting bars should be provided with recesses so as to avoid interference with cable Il (see recess 23 in bar 23, Figure 1). I claim: 1. A device of the nature described, includin an'elongated plug member adapted for sliding l engagement with/a socket member, an' arm pivoted on one side of said plug and extending diagonally thereacross and having a free end normally disposed adjacent the socket member a second arm pivoted on the opposite side of said 4 plug and extending diagonally thereacross subst'antiallyparallel to said iirst mentioned'arm and having a free end similarly disposed, anda bar connecting the other lendsv of said arms, another pair of arms similarly pivoted to said plug and extending diagonally across the same,

in a direction substantially opposite to that of the rst mentioned two arms, having free ends likewise normally disposed adjacent the socket member, and another bar connecting their other 4 2.- A device of the nature described, including an elongated plug member adapted for sliding engagement with a socket member, an arm pivwhen said plug4 member is engaged therewith,

ends, and spring means adapted to restore said arms to their normal conditions after movement therefrom.

oted on one .side of said iplug and extending diagonally thereacross and having a free end normally disposed adjacent the socket member when said plug member is engaged therewith, a second armvpivoted on the opposite side of said plug and extendlngdiagonally thereacross substantially parallel to said ilrst mentioned arm and having a free `end similarly disposed, and a bar connecting the other ends of said arms, another pair of, arms similarly pivoted to said plug and extending diagonally across theV same in a vdirection substantially opposite to that of the ilrst mentioned two armshaving free ends likewise normally disposed adjacent the socket member, and another bar connecting their other ends, and a spring-or the like interconnecting said arms adapted to restore the same to their normal. conditions after movement therefrom.

LUNCEFORD P. GUJLEN'I'INE'.

jREFERENCES CITED The following references are of record in the nie of this patent:

UNITED STATES PATENTS 

